This WWI 1918 Combat Trench Knuckle Knife Replica is an exact copy of the one issued to troops during the first World War. Since trench warfare was such gruesome, close-quarter battles, the trench knife allowed soldiers to not only stab but also bludgeon enemies with the knuckle guard handle. Features: 6 3/8" AUS-6 stainless steel double-edged blade Sheath sold separately 11" overall